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Multi-Party Quantum Private Comparison Based on Bell States.

Wanqing Wu1,2, Jiahui Wu1,2, Lingna Guo1,2

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|August 26, 2023
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Summary
This summary is machine-generated.

This study introduces a new multi-party quantum private comparison (MQPC) protocol using Bell states for enhanced efficiency and security. It simplifies implementation by avoiding complex quantum states and entanglement swapping, offering a robust solution for secure data comparison.

Keywords:
Bell statemulti-party quantum private comparison (MQPC)unitary operation

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Area of Science:

  • Quantum Information Science
  • Cryptography
  • Computer Science

Background:

  • Multi-party quantum private comparison (MQPC) protocols are crucial for secure data exchange among multiple entities.
  • Existing MQPC protocols often depend on complex quantum states and resource-intensive methods, limiting their practical application.
  • There is a need for more efficient and implementable MQPC solutions.

Purpose of the Study:

  • To propose a novel multi-party quantum private comparison (MQPC) protocol that is efficient and secure.
  • To overcome the limitations of current MQPC protocols, particularly their reliance on difficult-to-prepare quantum states and entanglement swapping.
  • To enhance the security and integrity of quantum private comparison through advanced techniques.

Main Methods:

  • Developed a new MQPC protocol based on Bell states, eliminating the need for entanglement swapping.
  • Utilized an ideal channel assumption for protocol design.
  • Incorporated a trusted party to prepare and distribute encoded quantum sequences to participants.
  • Integrated decoy photon and shared key technologies for enhanced security.

Main Results:

  • The proposed MQPC protocol demonstrates significantly improved efficiency compared to existing methods.
  • The protocol effectively compares secret information among multiple parties.
  • The use of Bell states simplifies implementation compared to protocols requiring complex quantum states.
  • Decoy photon and shared key technologies render external and internal attacks ineffective.

Conclusions:

  • The novel MQPC protocol offers a more efficient and practical approach to secure multi-party private comparison.
  • The protocol's design based on Bell states enhances implementability and resource efficiency.
  • The integrated security mechanisms provide robust protection against various quantum attacks, ensuring data integrity.